linux-kernel - Re: Kernel 4.17.4 lockup

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Message-ID: <9548e10a-7403-425e-bf1f-b1eb9d055d99@intel.com>
Date:   Mon, 9 Jul 2018 20:47:47 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     "H.J. Lu" <hjl.tools@...il.com>
Cc:     "H. Peter Anvin" <hpa@...or.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Mel Gorman <mgorman@...e.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Rik van Riel <riel@...riel.com>,
        Minchan Kim <minchan@...nel.org>
Subject: Re: Kernel 4.17.4 lockup

On 07/09/2018 07:14 PM, H.J. Lu wrote:
>> I'd really want to see this reproduced without KASLR to make the oops
>> easier to read.  It would also be handy to try your workload with all
>> the pedantic debugging: KASAN, slab debugging, DEBUG_PAGE_ALLOC, etc...
>> and see if it still triggers.
> How can I turn them on at boot time?

The only thing you can add at boot time is slab debugging, and it's
probably the most useless of the three that I listed since you're not
actually seeing any slab corruption.

The rest are compile-time options.